Efficient photocatalytic destruction of recalcitrant micropollutants using graphitic carbon nitride under simulated sunlight irradiation

Zhong, Jiexi; Jiang, Hui; Wang, Zhiliang; Yu, Zhigang; Wang, Lianzhou; Mueller, Jochen F.; Guo, Jianhua

doi:10.1016/j.ese.2021.100079

Cited by 52 publications

(12 citation statements)

References 62 publications

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“…The CTA was achieved by taking 1 mmol of p-benzoquinone, isopropyl alcohol (IPA), AgNO 3 , and triethanolamine (TEA) as quenching agents to trap O 2 −• , • OH, e − , and h + , respectively [ 46 ]. The outcome of CTA was depicted in Figure 8b .…”

Section: Resultsmentioning

confidence: 99%

LED-light-activated photocatalytic performance of metal-free carbon-modified hexagonal boron nitride towards degradation of methylene blue and phenol

Mishra¹,

Saravanan²

2022

Beilstein J. Nanotechnol.

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The present study outlines the transformation of non-photoresponsive hexagonal boron nitride (HBN) into a visible-light-responsive material. The carbon modification was achieved through a solid-state reaction procedure inside a tube furnace under nitrogen atmosphere. In comparison to HBN (bandgap of 5.2 eV), the carbon-modified boron nitride could efficiently absorb LED light irradiation with a light harvesting efficiency of ≈90% and a direct bandgap of 2 eV. The introduction of carbon into the HBN lattice led to a significant change in the electronic environment through the formation of C–B and C–N bonds which resulted in improved visible light activity, lower charge transfer resistance, and improved charge carrier density (2.97 × 1019 cm−3). This subsequently enhanced the photocurrent density (three times) and decreased the photovoltage decay time (two times) in comparison to those of HBN. The electronic band structure (obtained through Mott–Schottky plots) and charge trapping analysis confirmed the dominance of e−, O2−•, and •OH as dominant reactive oxygen species. The carbon modification could effectively remove 93.83% of methylene blue (MB, 20 ppm solution) and 48.56% of phenol (10 ppm solution) from the aqueous phase in comparison to HBN which shows zero activity in the visible region.

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Section: Resultsmentioning

confidence: 99%

LED-light-activated photocatalytic performance of metal-free carbon-modified hexagonal boron nitride towards degradation of methylene blue and phenol

Mishra¹,

Saravanan²

2022

Beilstein J. Nanotechnol.

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“…The details of HPLC-MS/MS information and quantification methods were documented in our previous study. 24 HPLC-MS/MS was mass-checked in each mode before analysis and every 10 samples during sample injection. The precursor and the fragment ion used for MP quantification are listed (Table S1).…”

Section: Methodsmentioning

confidence: 99%

“…Recently, photocatalysis has been proposed as one of the alternative approaches for removing refractory contaminants. − For example, a metal-free, visible-light-responsive photocatalyst graphitic carbon nitride (g-C 3 N 4 ) has drawn increasing interest in environmental pollutant remediation because of its appealing band structure, stable physicochemical performance, “earth-abundant” nature, and economic feature . Previous studies mainly focused on the assessment of g-C 3 N 4 -based photocatalysts in removing single MPs at a high concentration (mg/L level). , However, there are very few studies evaluating their performance in simultaneous removal of chemical and biological contaminants .…”

Section: Introductionmentioning

confidence: 99%

Synergistic Combination of Graphitic Carbon Nitride and Peroxymonosulfate for Efficient Photocatalytic Destruction of Emerging Contaminants under Simulated Solar Irradiation

Zhong

Ahmed

et al. 2022

ACS EST Water

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The prevalence of micropollutants (MPs) and antibiotic resistance in various aquatic environments has raised increasing concerns for public health and ecological security. Conventional wastewater treatment processes exhibit a relatively limited removal efficiency to these contaminants. Although photocatalytic processes are proposed as an effective solution, very few studies have investigated the simultaneous removal of chemical and biological contaminants. To develop a "onestop" photocatalytic process, this study combined urea-based graphitic carbon nitride (g-C 3 N 4 ) with peroxymonosulfate (PMS) and evaluated its performance in the simultaneous removal of multiple MPs, antibioticresistant bacteria (ARB), and antibiotic resistance genes (ARGs) at environmentally relevant concentrations. The system removed 87% of MPs (10 μg/L each) and achieved 6.5-log ARB reduction within a 5 min treatment. In addition, the concentrations of extracellular ARGs (e-tetA and e-bla TEM-1 ) were rapidly decreased, with 4.8-log and 6.7-log reductions after a 30 min treatment, respectively. Atomic force microscopy images showed that the naked plasmid DNA was destructed. Radical quenching and electron paramagnetic resonance experiments further confirmed that both radical and nonradical pathways are involved in ARB inactivation in a g-C 3 N 4 /PMS photocatalytic system. Collectively, the g-C 3 N 4 /PMS photocatalytic system can efficiently achieve simultaneous removal of MPs and ARB as well as ARG destruction, therefore being a promising "one-stop" decontamination solution. KEYWORDS: graphitic carbon nitride (g-C 3 N 4 ), photocatalysis, micropollutants (MPs), antibiotic-resistant bacteria (ARB), antibiotic resistance genes (ARGs), peroxymonosulfate (PMS)

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“…Advanced oxidation processes (AOPs) are considered as the most promising approach to remove the persistent organic pollutants via generating sufficient reactive oxygen species (ROS). , Recently, more and more attention has been redirected to photocatalysis, a typical AOP, owing to the nature of low energy consumption and environmental-friendliness. − Driven by light, the excited charge carriers would transfer to the photocatalyst surface and generate ROS to effectively degrade organic pollutants. − …”

Section: Introductionmentioning

confidence: 99%

Piezoelectric-Induced Internal Electric Field in Bi₂WO₆ Nanoplates for Boosting the Photocatalytic Degradation of Organic Pollutants

Jiang

Tan

Huang

2022

ACS Appl. Nano Mater.

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The internal electric field induced by a piezoelectric effect is a promising method to suppress rapid electron–hole recombination of photocatalysis for environmental remediation. Herein, we fully utilized both piezoelectric and photocatalytic properties of Bi2WO6 nanoplates for the removal of organic pollutants. The degradation rate constant of piezo-photocatalysis is dramatically boosted to 0.077 min–1 by the Bi2WO6 nanoplates, which is 4.2-fold of the photocatalysis alone. The superior catalytic activity of Bi2WO6 nanoplates was attributed to the accelerated electron–hole pair separation efficiency associated with the enhancement of the piezoelectric effect-induced internal electric field. Based on the theoretical calculation, the bandgap of Bi2WO6 nanoplates would decrease from 1.99 to 1.67 eV under mechanical strains, indicating that broader light harvesting and faster charge transfer can be achieved with the assistance of the piezoelectric field. Accordingly, multiple reactive oxygen species (·O2 – and ·OH) are dominant for the degradation activity based on the quenching experiments and EPR analysis, outperforming piezocatalysis and photocatalysis. We have provided a new strategy to improve the catalytic decontamination performance.

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Efficient photocatalytic destruction of recalcitrant micropollutants using graphitic carbon nitride under simulated sunlight irradiation

Cited by 52 publications

References 62 publications

LED-light-activated photocatalytic performance of metal-free carbon-modified hexagonal boron nitride towards degradation of methylene blue and phenol

LED-light-activated photocatalytic performance of metal-free carbon-modified hexagonal boron nitride towards degradation of methylene blue and phenol

Synergistic Combination of Graphitic Carbon Nitride and Peroxymonosulfate for Efficient Photocatalytic Destruction of Emerging Contaminants under Simulated Solar Irradiation

Piezoelectric-Induced Internal Electric Field in Bi₂WO₆ Nanoplates for Boosting the Photocatalytic Degradation of Organic Pollutants

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Efficient photocatalytic destruction of recalcitrant micropollutants using graphitic carbon nitride under simulated sunlight irradiation

Cited by 52 publications

References 62 publications

LED-light-activated photocatalytic performance of metal-free carbon-modified hexagonal boron nitride towards degradation of methylene blue and phenol

LED-light-activated photocatalytic performance of metal-free carbon-modified hexagonal boron nitride towards degradation of methylene blue and phenol

Synergistic Combination of Graphitic Carbon Nitride and Peroxymonosulfate for Efficient Photocatalytic Destruction of Emerging Contaminants under Simulated Solar Irradiation

Piezoelectric-Induced Internal Electric Field in Bi2WO6 Nanoplates for Boosting the Photocatalytic Degradation of Organic Pollutants

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Product

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Piezoelectric-Induced Internal Electric Field in Bi₂WO₆ Nanoplates for Boosting the Photocatalytic Degradation of Organic Pollutants